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參數資料
| 型號： | LP3991TL-1.3 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 300mA Linear Voltage Regulator for Digital Applications |
| 中文描述： | FIXED POSITIVE LDO REGULATOR, PBGA4 |
| 封裝： | 0.963 X 1.446 MM, LEAD FREE, MICRO SMD-4 |
| 文件頁數： | 1/14頁 |
| 文件大小： | 266K |
| 代理商： | LP3991TL-1.3 |
January 2007
LP3991
300mA Linear Voltage Regulator for Digital Applications
General Description
Operating from a minimum input voltage of 1.65V, the LP3991
regulator has been designed to provide fixed stable output
voltages for load currents up to 300mA. This device is suitable
where accurate, low voltages are required from low input volt-
age sources and is therefore suitable for post regulation of
switched mode regulators. In such applications, significant
improvements in performance and EMI can be realized, with
little reduction in overall efficiency. The LP3991 will provide
fixed outputs as low as 1.2V from a wide input range of 1.65V
to 3.6V Using the enable pin, the device may be controlled to
provide a shutdown state, in which negligible supply current
is drawn.
The LP3991 is designed to be stable with space saving ce-
ramic capacitors as small as 0402 case size.
Performance is specified for a -40°C to 125°C junction tem-
perature range.
For output voltage options please contact your local NSC
sales office.
Features
■
Operation from 1.65V to 3.6V Input
■
1% accuracy at room temperature
■
Output Voltage from 1.2V to 2.8V
■
125mV Dropout at 300mA load
■
50μA Quiescent Current at 1mA Load
■
Inrush Current controlled to 600mA
■
PSRR 65dB at 1kHz
■
100μs Start-Up time for 1.5V V
OUT
■
Stable with Ceramic Capacitors as small as 0402
■
Thermal-Overload and Short-Circuit Protection
Package
4 pin micro SMD (0.963mm x 1.446mm)
For other package options contact your NSC sales office.
Applications
■
Post DC/DC Regulator
■
Battery Operated Devices
■
Hand-Held Information Appliances
Typical Application Circuit
20110002
2007 National Semiconductor Corporation
201100
www.national.com
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| LP3991TL-2.0 | 300mA Linear Voltage Regulator for Digital Applications |
| LP3991TL-2.5 | 300mA Linear Voltage Regulator for Digital Applications |
| LP3991TL-2.8 | 300mA Linear Voltage Regulator for Digital Applications |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LP3991TL-2.0/NOPB | 功能描述:低壓差穩壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP3991TL-2.5/NOPB | 功能描述:低壓差穩壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP3991TL-2.8 | 制造商:Texas Instruments 功能描述:LDO Regulator Pos 2.8V 0.3A 4-Pin uSMD T/R 制造商:Texas Instruments 功能描述:V REG, LDO, 300MA 2.8V, MICRO SMD-4 |
| LP3991TL-2.8/NOPB | 功能描述:低壓差穩壓器 - LDO 300Ma Low Vin LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP3991TL-3.0/NOPB | 功能描述:低壓差穩壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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